HUD6182

A Math Problem

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 211    Accepted Submission(s): 101

Problem Description

You are given a positive integer n, please count how many positive integers k satisfy kk≤n.

 

Input

There are no more than 50 test cases.

Each case only contains a positivse integer n in a line.

1≤n≤1018

 

Output

For each test case, output an integer indicates the number of positive integers k satisfy kk≤n in a line.

 

Sample Input

1
4

 

Sample Output

1
2

 

Source

2017ACM/ICPC广西邀请赛-重现赛（感谢广西大学）

 

 //2017-08-31
 #include <cstdio>
 #include <cstring>
 #include <iostream>
 #include <algorithm>
 #define ll long long

 using namespace std;

 const int N = ;
 ll arr[N];

 int main()
 {
     for(ll i = ; i <= ; i++){
         arr[i] = ;
         for(int j = ; j < i; j++)
               arr[i] *= i;
     }
     ll n;
     while(cin>>n){
         int ans = ;
         for(int i = ; i <= ; i++){
             if(arr[i] <= n){
                 ans++;
             }
         }
         cout<<ans<<endl;
     }

     return ;
 }